AutoPLANT PXF Out

Hi, I am trying to PXF out infor from an Autoplant Piping model but am getting an error as below.

 

Error: XCHG0000: Unable to read Plant North from V:\CAD\250\MOD\220L1071EM116-1.DWGReinitialize drawingWarning: XCHG1004: Unable to get Plant data. Excluding drawing: V:\CAD\250\MOD\220L1071EM116-1.DWGWarning: XCHG1006: No Modelling documents in the selection meet the criteria.Info: XCHG0505: Completed export on Mon Jun 02 10:50:53 2014

This restricted to one designer and the piping models they have worked on, other models in the same project are fine.